Technical data for Ytterbium

Overview
NameYtterbium
SymbolYb
Atomic Number70
Atomic Weight173.04
Density6.57 g/cm3
Melting Point819 °C
Boiling Point1196 °C

Thermal properties
PhaseSolid
Melting Point819 °C
Boiling Point1196 °C
Absolute Melting Point1092 K
Absolute Boiling Point1469 K
Heat of Fusion7.7 kJ/mol
Heat of Vaporization160 kJ/mol
Heat of CombustionN/A
Specific Heat154 J/(kg K)[note]
Thermal Conductivity39 W/(m K)
Thermal Expansion0.0000263 K-1

Bulk physical properties
Density6.57 g/cm3
Density (Liquid)6.21 g/cm3
Molar Volume0.000026338
Brinell Hardness343 MPa
Vickers Hardness206 MPa
Bulk Modulus31 GPa
Shear Modulus9.9 GPa
Young Modulus24 GPa
Poisson Ratio0.21
Speed of Sound1590 m/s
Thermal Conductivity39 W/(m K)
Thermal Expansion0.0000263 K-1

Reactivity
Valence3
ElectronegativityN/A
ElectronAffinity50 kJ/mol
Ionization Energies
603.4, 1174.8, 2417, 4203 kJ/mol

Health and Safety
Autoignition PointN/A
FlashpointN/A

Classifications
Alternate NamesNone
Nams of AllotropesNone
Blockf
GroupN/A
Period6
Electron Configuration[Xe]4f146s2
ColorSilver
Discovery
1878 in Switzerland
Gas phaseN/A
CAS NumberCAS7440-64-4

Electrical properties
Electrical TypeConductor
Electrical Conductivity3.6×106 S/m
Resistivity2.8×10-7 m Ω
Superconducting PointN/A

Magnetic properties
Magnetic TypeN/A
Curie PointN/A
Mass Magnetic Susceptibility5.9×10-9
Molar Magnetic Susceptibility1.02×10-9
Volume Magnetic Susceptibility0.0000388

Abundances
% in Universe2×10-7%
% in Sun1×10-7%
% in Meteorites0.000018%
% in Earth's Crust0.00028%
% in Oceans8×10-11%
% in HumansN/A

Atomic dimensions and structure
Atomic Radius222 pm
Covalent RadiusN/A
Van der Waals RadiusN/A
Crystal StructureFace Centered Cubic
Lattice Angles
π/2, π/2, π/2
Lattice Constants
548.47, 548.47, 548.47 pm
Space Group NameFm_ 3m
Space Group Number225

Nuclear Properties
Half-LifeStable
LifetimeStable
Stable Isotopes
168Yb, 170Yb, 171Yb, 172Yb, 173Yb, 174Yb, 176Yb
Isotopic Abundances
168Yb0.13%
170Yb3.04%
171Yb14.28%
172Yb21.83%
173Yb16.13%
174Yb31.83%
176Yb12.76%

Notes on the properties of Ytterbium:
Specific Heat: Value given for solid phase.